用C语言编写的GSM-SIM驱动程序包，包含目前常用的GSM短消的发送以及GPRS的实现，针对各个GSM模块编写不同的驱动程序。,Using C language GSM-SIM driver package, including the currently used GSM short of sending as well as the elimination of the achievement of GPRS, GSM module prepared for each different

GPRS通讯电路的主要构成，GPRS模块的控制接口和AT命令的使用！-GPRS communication circuit main components, GPRS module AT command control interface and use!

此源文件可以帮助学者运用GPRS模块实现处理器与远程服务器的数据交换与处理，实用性很强。-GPRS introductory and using guide